how did you calculate port length with it being angled like that? i am also doing a similar box. would it be more benefitial going out the front as you did or to go out the top?

ngsm13

08-21-2007, 10:56 PM

You take the length down the middle of the port in all axes.

nG

liqdfire4755

08-21-2007, 11:51 PM

could you elaborate a little?

ngsm13

08-22-2007, 12:00 AM

could you elaborate a little?

Take a measurement from the middle of the slant (ex: slant if 17" long... measure @8.5")... down the middle of the port (port is 4" wide, measure at 2").

So using that example... your port needs to be the desired length at 8.5" down and 2" to the inside of the port.

Hope it makes sense.

nG

bjfish11

08-22-2007, 12:15 AM

Thanks guys.

THUNDERBIRD

08-22-2007, 12:30 AM

that looks great you do good work.

BZA

08-22-2007, 01:40 AM

looks dope. i have sumone building me a similar box.

Exploder

08-22-2007, 02:00 AM

I never seen a box u have made yet. (yes i live under a rock)

anyway the tag on the lower right makes it look like a $300 box

Great Craftmenship...Nice

IamDeMan

08-22-2007, 07:17 AM

Thanks fish! I just didn't have the time to do this box myself. It was well worth it, having you do this one for me. I can't wait to load it with a Mag. :)

bjfish11

08-22-2007, 07:38 AM

Thanks guys.

Rob I just sent tracking info. The box actually shipped out yesterday morning, I just didnt get around to get you the tracking number.

truckstoy

08-22-2007, 09:27 AM

yet another great job!!!!!!

truck

W8 a minute

08-23-2007, 02:48 AM

Nice. I probably shouldn't say this but I always find slanted boxes aggravating. No matter how many times I measure the angle of my blade it never ends up "on the money" and is a couple of degrees off. I always end up using scrap wood to set it perfectly.

IamDeMan

08-24-2007, 03:18 PM

It arrived today. DHL struck me on this one. Not a packaging problem as fish did have protectors on the corners but DHL still manage to mangle a corner. It isn't devastating and I can mask it a bit, plus it won't really be seen when installed. Here are the pics of how I found it though.

http://img.photobucket.com/albums/v212/IamDeMan/fisherbox001.jpg

http://img.photobucket.com/albums/v212/IamDeMan/fisherbox002.jpg

http://img.photobucket.com/albums/v212/IamDeMan/fisherbox003.jpg

And here is the bad corner.

http://img.photobucket.com/albums/v212/IamDeMan/fisherbox004.jpg

http://img.photobucket.com/albums/v212/IamDeMan/fisherbox005.jpg

Here is the sexiness that is called Mag installed in this bad mutha.

http://img.photobucket.com/albums/v212/IamDeMan/fisherbox006.jpg

Now I got to finish my doors and get this **** installed.

BassAce

08-24-2007, 03:22 PM

Man they managed to ruin it on the front, regardless it still looks nice.

IamDeMan

08-24-2007, 03:30 PM

Man they managed to ruin it on the front, regardless it still looks nice.
Indeed, at least it was bottom and won't be seen too easily. the lip where the seats fold down should hide it for the most part, but I am gonna pound it gently and spray a light mist of flat black to blend it in so wood isn't really seen.

Additionally I'd like to say this build is top notch as always. I felt around all inside seams and this **** lines up and isnt caulked up to hide. Fisher has the tools and knows how to use em. I was worried about matching seams inside perfectly with this angle and 3 walls in a sense plus my time is lmited. That was my reason to give fish some business. He doesn't dissapoint and is well worth his price f admission.

IamDeMan

08-25-2007, 10:15 AM

Here it is fitting in the trunk like it was meant to. It is just small enough to pull in and out through the trunk lid. No need to go through seat opening.

http://img.photobucket.com/albums/v212/IamDeMan/fisherbox007.jpg

http://img.photobucket.com/albums/v212/IamDeMan/fisherbox008.jpg

http://img.photobucket.com/albums/v212/IamDeMan/fisherbox009.jpg

Megalomaniac

08-25-2007, 10:35 AM

can i buy your mag :)

Exploder

08-25-2007, 10:54 AM

we have some type of cardboard corners that we wrap our product with when we ship it

dude that looks killer

Immacomputer

08-25-2007, 12:17 PM

Build looks great, but really, the inside port wall needs to be slanted as well to keep the port area constant throughout the enclosure.

It's too bad DHL ****ed up that corner; it still looks very **** installed!

IamDeMan

08-25-2007, 02:01 PM

Build looks great, but really, the inside port wall needs to be slanted as well to keep the port area constant throughout the enclosure.

It's too bad DHL ****ed up that corner; it still looks very **** installed!I have never heard this to be true. The math adds up and tuning is correct. I don't see how slanting the other end is necessary. Is like slash cutting cylindrical ports. As long as the length through the middle is correct then the tuning is correct.

Yes it does look **** installed :)

we have some type of cardboard corners that we wrap our product with when we ship it

dude that looks killer
He had corner pieces.

can i buy your mag :)
No :p:

tapout

08-25-2007, 02:06 PM

great build. That install is sleek. Nice.

mjf

08-25-2007, 02:45 PM

I have never heard this to be true. The math adds up and tuning is correct. I don't see how slanting the other end is necessary. Is like slash cutting cylindrical ports. As long as the length through the middle is correct then the tuning is correct.

Yes it does look **** installed :)

He had corner pieces.

No :p:

measure from the top to the end of the port, then the bottom to the end of the port.

with it like that you'll get two different numbers.

to maintain tuning they should be the same length, it probably not enough difference to notice. but with each piece being a different length it makes sense.

IamDeMan

08-25-2007, 02:59 PM

measure from the top to the end of the port, then the bottom to the end of the port.

with it like that you'll get two different numbers.

to maintain tuning they should be the same length, it probably not enough difference to notice. but with each piece being a different length it makes sense.
No you dont
Its like having a bend in it to begin with. the outer length isn't the same as the inner part of the bend. It is the measurement in the middle which is going to be the "median" of both numbers that matters. Continuity in a port isn't what dictates tuning. It is the sq area vs the median length that dictates it. It doesn't metter if you use 45*, 90* bends or slash cuts. As long as the median length is correct then tuning is spot on.

mjf

08-25-2007, 03:16 PM

No you dont
Its like having a bend in it to begin with. the outer length isn't the same as the inner part of the bend. It is the measurement in the middle which is going to be the "median" of both numbers that matters. Continuity in a port isn't what dictates tuning. It is the sq area vs the median length that dictates it. It doesn't metter if you use 45*, 90* bends or slash cuts. As long as the median length is correct then tuning is spot on.

im well aware of sq area and length.

but with length alone it would seem to make a difference.:confused:

something just seems a bit off with not having the slant and not maintaining the same port length. its not like only the middle of the port is being utilized, its the whole port i dont exactly understand how the few inches that are left off/added at the top/bottom wont effect the tuning whatsoever.

not arguing with you at all, im just interested in finding this out:)

Immacomputer

08-25-2007, 03:24 PM

Continuity in a port isn't what dictates tuning. It is the sq area vs the median length that dictates it.

Actually, it's the air mass in the port and the surface area of that air mass that matters, not the length. The length is given to you once you know the correct surface area of the air mass. You know the tuning with the mass of the volume of air and with the surface area. When you know the tuning, you know how much air is needed. That is then turned into the correct length you need. Without the slant on both ends, the air mass calculation will be off and thus, your tuning will be slightly off. It won't vary much but it will be off some.

IamDeMan

08-25-2007, 03:45 PM

Actually, it's the air mass in the port and the surface area of that air mass that matters, not the length. The length is given to you once you know the correct surface area of the air mass. You know the tuning with the mass of the volume of air and with the surface area. When you know the tuning, you know how much air is needed. That is then turned into the correct length you need.
Exactly and the mass will be correct provided the MEDIAN length and area is correct. Which is why I worded it that way. There is nothing in the formula that says continuity has to be kept or that it has to symmetrical. The mass is correct plain and simply put. The calculation is NOT off. It is still the desired mass. Having a slant at one end or a bend in it doesn't change the equation :crap: My median length(average of longest length and shorted length) is still the desired measurement making the total mass correct. It's basic mathematics. It is probably easier to tune with both sides having the same degree of angle, but it isn't a necessity to achieve the same desired results. Just involves slightly more figuring.

If what you are saying were correct, then my internal volume for woofer cavity would be off too because the top has less length than bottom, so it throws off the equation slightly. It makes no sense whatsoever. Mass is mass no matter if lengths on all walls is same or not. You add them up and you get a number.

IamDeMan

08-25-2007, 03:48 PM

im well aware of sq area and length.

but with length alone it would seem to make a difference.:confused:

something just seems a bit off with not having the slant and not maintaining the same port length. its not like only the middle of the port is being utilized, its the whole port i dont exactly understand how the few inches that are left off/added at the top/bottom wont effect the tuning whatsoever.

not arguing with you at all, I'm just interested in finding this out:)Because the same amount it is short at top it is that much longer at bottom, making the OVERALL length the same.

Mass is dictated by measurements, no mater how obscure or non-uniform they are, the measurements still add up to the same mass. I feel it is your own personal preferences to keep everything symmetrical. This however doesn't change the fact that the math is still right.

Immacomputer

08-25-2007, 04:24 PM

Ah, you're taking the port area to be just the vertical and horizontal section instead of the slanted section. You're correct and it will work fine like that as long as the slant isn't too extreme. The max the bottom should vary from the top is half the height of the port.

IamDeMan

09-14-2007, 05:55 PM

Couple vids to post up. I got my wiring ran to the trunk, so I had to toss the amp in there temporarily to fire this thing up.